/*
 * Copyright (C) 2010, 2012 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "core/html/forms/ValidationMessage.h"

#include "core/html/HTMLFormControlElement.h"
#include "core/page/Page.h"
#include "core/page/ValidationMessageClient.h"
#include "wtf/PassOwnPtr.h"

namespace WebCore {

ALWAYS_INLINE ValidationMessage::ValidationMessage(HTMLFormControlElement* element)
    : m_element(element)
{
    ASSERT(m_element);
}

ValidationMessage::~ValidationMessage()
{
    if (ValidationMessageClient* client = validationMessageClient())
        client->hideValidationMessage(*m_element);
}

PassOwnPtr<ValidationMessage> ValidationMessage::create(HTMLFormControlElement* element)
{
    return adoptPtr(new ValidationMessage(element));
}

ValidationMessageClient* ValidationMessage::validationMessageClient() const
{
    Page* page = m_element->document().page();
    if (!page)
        return 0;
    // The form valdiation feature requires ValidationMessageClient.
    ASSERT(page->validationMessageClient());
    return page->validationMessageClient();
}

void ValidationMessage::updateValidationMessage(const String& message)
{
    ValidationMessageClient* client = validationMessageClient();
    if (!client)
        return;
    if (message.isEmpty())
        requestToHideMessage();
    else
        client->showValidationMessage(*m_element, message);
}

void ValidationMessage::requestToHideMessage()
{
    if (ValidationMessageClient* client = validationMessageClient())
        client->hideValidationMessage(*m_element);
}

bool ValidationMessage::isVisible() const
{
    if (ValidationMessageClient* client = validationMessageClient())
        return client->isValidationMessageVisible(*m_element);
    return false;
}

} // namespace WebCore